Utilizing riometry to observe gravity waves in the sunlit mesosphere
Article first published online: 4 OCT 2003
Copyright 2003 by the American Geophysical Union.
Geophysical Research Letters
Volume 30, Issue 19, October 2003
How to Cite
2003), Utilizing riometry to observe gravity waves in the sunlit mesosphere, Geophys. Res. Lett., 30, 1979, doi:10.1029/2003GL017885, 19., , , and (
- Issue published online: 4 OCT 2003
- Article first published online: 4 OCT 2003
- Manuscript Accepted: 25 AUG 2003
- Manuscript Revised: 6 AUG 2003
- Manuscript Received: 3 JUN 2003
 The novel use of imaging riometers to observe mesospheric gravity waves is described. Imaging riometers respond to changes in the absorption of cosmic radio noise in the ionospheric D-region which enables them to detect the compression and rarefaction of the atmosphere at ∼90 km altitude generated by the passage of gravity waves. A considerable advantage of this method is that, unlike conventional techniques which rely on imaging faint optical emissions from the airglow layer at ∼87 km altitude, riometers remain operative under daylit, moonlit or cloudy conditions. This is particularly important for research into gravity wave forcing of mesospheric temperature at polar latitudes in summer when continuous 24-hour daylight prevails. An example in which the same wave event is characterized in co-located airglow imager and imaging riometer shows good agreement between the two instruments.